Improvement in railroad-lamps



J. CARTON.

Railroad Lamp.

Patented Oct. 7,1862.

N. FUCHS. Phmumm npher. Wuhiflglon. D.C.

UNITED STATES PATENT EEIcE.

JOHN CARTON, OF UTIGA, NEW YORK.

IMPROVEMENT lN RAILROAD-LAMPS.

Specification forming part of Letters Patent No. 36.602, dated October7, 1862.

To all whom it may concern:

Be it known that I, JOHN CARTON, ofUtica, New York, have invented anImprovementin Railroad and other Lamps; andI do hereby declare that thefollowing is an exact description thereof, reference being had to theaccompanying drawings, in which- Figure l is a vertical section of thelamp, and Fig. 2 a perspective view of theimprovement, together with theouter tube.

Letter A represents the glass globe or chimney; B, the button; 01,, theupper part of the cap, and F the opening therein; D D, thelower half ofthe cap. E is the outer tube, and G the inner tube, and H the chamberformed by the cap.

The general principle of the lamp to which I apply my improvement, is soconstructing the same as to prevent the outer air from striking theblaze, and also of heating the air beforeit reaches the flame. Theseprinciples are embodied in the patent granted to me for an improvementin railroad-lamps, hearing date May 1, 1860, and are therefore notclaimed here. My improvement consists in adding the chamber H to suchlamps. This is done by enlarging the upperend of the outer tube or thecap, and then causing it to curve inward, so that the upper aperture ofthe tube or cap shall be about the size of the circumference of thewick. A lamp constructed on this principle, with a straight outer tube,or without enlarging the cap, allows too little space for the air, afterit has become heated, and the flow of air becomes irregular, causingflickering and diminished light. By enlarging the top of the outer tube,so as to form the chamber H, the proper curve may be given to the cap,so that the air may be easilyand uniformly conveyed to any part of theflame.

The lamp on which this improvement may 7 be used may be of almost any ofthe ordinary forms of railroad or similar lamps where the outer tube maybe used. The outer tube and .cap are made of thin metal. The tube shouldbe from about five-eighths of an inch in diameter greater than theinnertube or burner, and is supported in place by webs extending from theinner tube. For ordinary sized railroadlamps, the tube and cap should beabout eight inches in length. They may bein one piece or in two or threepieces. I make the outer tube plain, separate, as more convenient, witha. snuff-box joint on its upper, end for fitting on the cap, and aboutsix and ahalf inches in length. The cap is made in two parts. The lowerpart, D, is made about two inches in length. Its lower end fits in theupper end of E. It is then caused to swell outward to form the lowerhalf of the chamber H. Then two square shoulders are formed on it-t-hefirst outward and the next upward-to provide a support for the glasschimney, as seen in the drawings. The upper part of the cap is' cupform, with the orifice Fin the center, and it has a rim around theenlarged edge to enable it to be attached to D, as seen at H. The glasschimney rests on this rim or flange, and is held in place by G and D, asseen at H. 0, when in place, should be about threeeighths of an inchabove the wick. The button is placed about an inch above the wick. Thearrows indicate the direction of the air, and the form of the flame isindicated in the drawings. Without the chamber H the air, when heated,seems to choke, and causes a very irregular and flickering flame anduncertain light; and the difficulty is not remedied by a change in therelative size of the parts; but it is, perfectly, by the use of thechamber.

I claim The outer tube, E, the cap thereof forming the chamber H, andthe button B, all constructed and operating, substantially as described,in combination.

JOHN CARTON.

\Vitnesses:

B. F. FRENCH, T. J. NEWLAND.

